Spring-clevis for plows.



No. 668,925 Patented Feb. 26, I901.

w. s. McFERBEN. SPRING CLEVIS FOR FLOWS.

(Application filed Dac. 22, 1900.)

(No Model.)

" rrn Sra'rns WILLIAM S. MOFERREN, OF NEW FRANKLIN, PENNSYLVANIA,ASSIGNOR OF ONE-THIRD TO HARRY R. MOFERREN, OF SAME PLACE.

SPRlNG-CLEVIS FOR PLOWS.

SPECIFICATION formingpart of Letters Patent No. 668,925, dated February26, 1901.

Application filed December 22,1900. serial No. 40,752- (No model.)

To all whom it may concern:

Beit known that 1, WILLIAM S. MoFERRnN, a citizen of the United States,residing at New Franklin, in the county of Franklin and State ofPennsylvania, have invented new and useful Improvements inSpring-Glevises for Plows, of which the following is a specification.

My invention relates to spring-clevises for plows; and the object of thesame is to produce a device of this character which can be attached toaplow to relieve the sudden strain caused by the striking of the plowpoint against some obstruction, such asaconcealed stone or stump. Withthis object in view I have devised the simple and novel constructionwhich is fully described in this specification and claimed, andillustrated in the accom panying drawings,forn1ing a part thereof, inwhich Figure 1 is a side elevation of my device with part broken away.Fig. 2 is an end elevation of the same.

Like numerals of reference designate like parts in both views of thedrawings.

The numeral 1 designates an integral head which has perforated cheeks 2and rearwardlyextending arms 3, pivoted on a cross-pin 4:, which extendstransversely through the forward end of a plow-beam 5. Bythisarrangement the head is free to move about the pin 4 as an axis. Aseries of perforations 2 in the cheeks 2 allow a range of adjustment fora clevis 6, which is pivoted on a pin 7, extending through two of theperforations 2. The back of the clevis 6 is also provided with a set ofperforations 6, which furnish attachment for asecond clevis 7, to whichthe doubletree is attached. To provide a bearing on the head 1 for aspring 8, a cross-bar 9 is socured between the upper portion of the twocheeks 2. On this bar 9 is mounted a dishfaced disk 10, Within whichfits the lower end of the spiral spring 8. The upper end of the spring 8bears against a cross-bar 11, which is adjustably mounted on the arms 12of a yoke 13. The adjustment of the bar is accomplished by nuts 12,fitted on the ends of the arms 12, and the yoke is secured to the underside of the beam 5 by a bolt It, passed through an aperture in thecrossbar 15 of the yoke. Space enough is left between the beam 5 and thearms 12 to permit the movement of the arms 3; but the downward movementis limited by the bar 15. To make my structure complete, some detailsare added in the shape of a brace l6,bearing on a cross-bar l7,connecting the arms 12, and a rod 18,f0oted in the disk 10 and bar 9 andmounted to slide in the cross-bar 11. This rod 18 serves as a guide andalso secures the spring 8, which surrounds it, against sidewisedisplacement.

When in use, the team is hitched to the clevis 7, as beforestated. Thespring Sis adjusted by the nuts 12 to a compression equal to a normalpull of the team. Therefore any unusual strain which is brought to bearon the clevis by the plows striking an obstacle, as before mentioned,will'compress the spring. The head 1 will be rotated about its axis,thereby relieving the strain on the beam 5. After the crisis has passedthe spring 8 will restore the head to its normal position in contactwith the bar 15.

I do not wish to be limited as to details of construction, as these maybe modified in many particulars without departing from the spirit of myinvention.

Having thus described my invention, what I claim as new, and wish tosecure by Letters Patent, is

1. The combination, substantially as described, with a plow-beam, of ahead pivoted to the forward end of said beam, a yoke rigidly secured tosaid beam, a bar adjustably mounted on the arms of said yoke, and aspring hearing at one end against said yoke and at the other end againstsaid head.

2. The combination, substantially as described, with a plow-beam, of ahead having rearwardly -extending arms pivoted to the forward end ofsaid plow-beam, a yoke mounted on said plow-beam and havingupwardlyextending arms, said yoke being positioned to limit the movementof said head in one direction, a bar adj ustably mounted on the saidarms of said yoke, and a spring hearing at one end against said head andat the other end against said bar.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

WILLIAM S. MOFERREN.

Witnesses:

W. O. NIOKLOS, CHAS. J. ZULLINGER.

